Easy-to-open Packaging Bag

ABSTRACT

The present invention discloses an easy-to-open packaging bag, comprising a bag body having a front sheet and a back sheet, wherein a height of the front sheet is smaller than the height of the back sheet, and an entrance of the packaging bag is arranged between an upper edge of the front sheet and an upper edge of the back sheet. A seal tab is arranged on the upper part of the back sheet and above the upper edge of the front sheet and comprises a release film layer and a pull tab from top to bottom in that sequence, wherein the release film layer is bonded with the seal tab via a first adhesive layer; the pull tab with an opening notch comprises a plastic layer bonded with the seal tab via a second adhesive layer, and a tensile strength of the plastic layer is greater than the tensile strength of the bag body. The object of easy opening is achieved by means of arranging a pull tab on the seal tab, with the pull tab being capable of being neatly pulled off.

This application claims priority benefit of CN206750527u, filed on Apr.19, 2017, the entirety of which being incorporated by reference herein.

FIELD OF INVENTION

The present invention relates to a packaging bag, and relates inparticular to an easy-to-open packaging bag.

BACKGROUND ART

With prevalence of E-commerce and blooming of express delivery,packaging bags are required for ever more commodities. The situationsfacing a prior art packaging bag are either use of waste plastic orlaborious inconvenience in being opened and sometimes requiring a pairof scissors or such like tools. Both situations would result in: 1.inconvenience and difficulty in opening the bag; 2. damage to packageddocuments; 3. waste of time in procuring a pair of scissors; 4. quicktemper and ill mood resulted therefrom. Therefore, an easy-to-openpackaging bag is in urgent need.

SUMMARY OF THE INVENTION

To solve the above technical problems, the present invention presents aneasy-to-open packaging bag for achieving the object of fast opening.

In order to achieve the object of fast opening, the technical solutionof the present invention is as follows:

An easy-to-open packaging bag, comprises a bag body having a front sheetand a back sheet, wherein a height of the front sheet is smaller thanthe height of the back sheet, and an entrance of the packaging bag isarranged between an upper edge of the front sheet and an upper edge ofthe back sheet. A seal tab is arranged on the upper part of the backsheet and above the upper edge of the front sheet and comprises arelease film layer and a pull tab from top to bottom in that sequence,wherein the release film layer is bonded with the seal tab via a firstadhesive layer; the pull tab comprises a plastic layer, the plasticlayer is bonded with the seal tab via a second adhesive layer, anopening notch is arranged on the pull tab, and a tensile strength of theplastic layer is greater than a tensile strength of the bag body.

In actual usage, the content in subject is put into the packaging bagfrom the entrance, the release film layer is peeled off to reveal thefirst adhesive layer, via which the seal tab is bonded with the frontsheet; while in opening the packaging bag, all is needed is just to gethold of the opening notch with one hand and to pull off the pull tabwith another, requiring no pair of scissors while saving needlessefforts.

Preferably, the material of the bag body, of the release film layer andof the plastic layer is plastic.

Preferably, the width of the plastic layer is 1-10 mm and the thicknessthereof is 0.01-0.2 mm.

Preferably, the width of the release film layer is greater than thethickness of the first adhesive layer.

Preferably, the width of the plastic layer is equal to the thickness ofthe second adhesive layer.

Preferably, the shape of the opening notch is circular, elliptic,rectangular or fan-shaped.

Preferably, the width of the opening notch is greater than or equal tothe width of the pull tab.

Preferably, a cross section of the opening notch is either detached orin dashed line.

Preferably, a guide slit is respectively arranged at either side of twoslitting directions of the opening notch.

Preferably, the length of the opening notch is 10-30 mm.

Advantageous Effects

The present invention achieves the object of easy opening by means ofarrangement of the pull tab, which is pulled off along the guide slitsin actual opening. In addition, due to the plastic layer on the pull tabhaving a thickness and tensile strength bigger than the neighboringmaterial thereof, the pull tab is pulled off neatly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the easy-to-open packaging bag of thepresent invention, wherein the opening notch is circular with the widththereof being greater than the width of the pull tab.

FIG. 2 is a schematic diagram of the cross-sectional view of FIG. 1.

FIG. 3 is a schematic diagram of the pull tab of the easy-to-openpackaging bag of the present invention, wherein the opening notch isrectangular.

FIG. 4 is a schematic diagram of the pull tab of the easy-to-openpackaging bag of the present invention, wherein the opening notch isfan-shaped.

FIG. 5 is a schematic diagram of the pull tab of the easy-to-openpackaging bag of the present invention, wherein the opening notch iselliptic.

FIG. 6 is a schematic diagram of the pull tab of the easy-to-openpackaging bag of the present invention, wherein the opening notch iscircular.

FIG. 7 is a schematic diagram of the easy-to-open packaging bag of thepresent invention subsequent to opening thereof.

FIG. 8 is a schematic diagram of a prior-art packaging bag.

FIG. 9 is a cross-sectional view of FIG. 8.

FIG. 10 is a schematic diagram of FIG. 8 subsequent to opening thereof.

FIG. 11 is a schematic diagram of the easy-to-open packaging bag of thepresent invention, wherein the width of the opening notch is equal tothe width of the pull tab.

FIG. 12 is a partial enlargement of the region marked by the circle inFIG. 1.

EMBODIMENTS Embodiment 1

As shown in FIGS. 1 and 2, an easy-to-open packing bag, comprises a bagbody having a front sheet 10 and a back sheet 20, wherein a height ofthe front sheet 10 is smaller than the height of the back sheet 20, andan entrance of the packaging bag is arranged between an upper edge ofthe front sheet 10 and an upper edge of the back sheet 20. A seal tab 1is arranged on the upper part of the back sheet 20 and above the upperedge 5 of the front sheet 10 and comprises a release film layer 2 and apull tab 3 from top to bottom in that sequence. A sectional view of theeasy-to-open packaging bag along the center A-A thereof is shown in FIG.2, wherein the seal tab 1 comprises a release film layer 2 and a pulltab 3 from top to bottom in that sequence, wherein the release filmlayer 2 is bonded with the seal tab 1 via the first adhesive layer; thepull tab 3 comprises a plastic layer, the plastic layer is bonded withthe seal tab 1 via a second adhesive layer, an opening notch 4 isarranged on the pull tab 3, and a tensile strength of the plastic layeris greater than a tensile strength of the bag body

The material of the bag body, of the release film layer and of theplastic layer is plastic, wherein the width of the release film layer isgreater than the thickness of the first adhesive layer, and the width ofthe plastic layer is equal to the thickness of the second adhesivelayer. The opening notch 4 can be arranged at either end or both ends ofthe pull tab 3, with FIG. 11 depicting the case of the opening notch 4being arranged at both ends of the pull tab 3; arrangement of theopening notch 4 at the left or right end is to suit right-handedness orleft-handedness respectively. The width of the opening notch 4 isgreater than or equal to the width of the pull tab 3. A cross section ofthe opening notch 4 is either detached or in dashed line. In the case ofthe detached cross section, it intersects with the seal tab 1, thesecond adhesive layer, and the plastic layer, i.e., all the three layersare sliced. In the case of the dashed line cross section, not all thethree layers are sliced. The guide slits 6 are respectively arranged onboth sides of the opening notch 4 at the end of the peeling directionthereof (with FIG. 12 depicting the case of the peeling direction in theright side), and the distance between the two guide slits 6 is greaterthan or equal to the width of the plastic layer, with a width 1 mm forthe plastic layer and a thickness of 0.01 mm therefor being a goodchoice for easy opening. Also required is a suitable tensile strength ofthe plastic layer, with a weak tensile strength thereof resulting inpossible broken pull tab in pulling off the pull tab. A length of 10 mmfor the opening notch is a right choice for easy manipulation.

The shape of the opening notch 4 is circular, elliptic, rectangular orfan-shaped. An elliptic or rectangular opening notch has the advantagesof reducing the height of the opening notch and the seal tab, and ofsaving in material, in addition to convenience in usage. A rectangularopening notch 4 is shown in FIG. 3, a fan-shaped opening notch 4 isshown in FIG. 4, an elliptical opening notch 4 is shown as in FIG. 5,and a circular opening notch 4 is shown as in FIG. 6.

The present invention achieves the object of easy opening by means ofarrangement of the pull tab 3, which in actual opening is pulled offalong the guide slits in the slitting direction. In addition, due to theplastic layer on the pull tab 3 having a thickness and tensile strengthbigger than the neighboring material thereof, the pull tab 3 is pulledoff neatly and with ease. FIG. 7 shows the easy-to-open packaging bag inworking. The seal tab 1 was previously folded along the upper edge 5 ofthe front sheet 10 and bonded with the front sheet 10 via the firstadhesive layer subsequent to peeling off of the release film layer 2.FIG. 7 shows pulling off of the pull tab 3 to a half course in actualopening of the easy-to-open packaging bag. As can be seen therein, thepull tab 3 and the opening notch 4 are in a perfect and neat condition,while the opened easy-to-open packaging bag would still be fit to servefor reuse, e.g., as a garbage bag.

FIG. 8 shows a packaging bag of the prior art, comprising a front sheet10 and a back sheet 20, with FIG. 9 depicting a sectional view thereofalong the center B-B thereof. A seal tab of the packaging bag of theprior art comprises a release film layer and an adhesive layer.Subsequent to putting content in subject into the packaging bag, therelease film layer is peeled off, and the seal tab 1 is folded to thefront sheet 10 along the upper of the front sheet and bonded with thefront sheet 10 via the adhesive layer after pulling off the release filmlayer. As can be seen from FIG. 10, compared with the easy-to-openpackaging bag of the present invention, the packaging bag of the priorart has following defects: the seal tab 1 tends to stick to the frontsheet, the pull tab is prone to breakage in opening the packaging bag,the opening process is difficult and sometimes requiring a pair ofscissors or such like tools, the packaging bag becomes formless in theopening process and would not serve for reuse.

Embodiment 2

In the current embodiment, the easy-to-open packing bag of the presentinvention is the same as that in Embodiment 1, except that the width ofthe plastic layer is 5 mm, the thickness thereof is 0.1 mm, and thelength of the opening notch 4 is 20 mm.

Embodiment 3

In the current embodiment, the easy-to-open packing bag of the presentinvention is the same as that in Embodiment 1, except that the width ofthe plastic layer is 10 mm, the thickness thereof is 0.2 mm, and thelength of the opening notch 4 is 30 mm.

We claim:
 1. An easy-to-open packaging bag, comprising a bag body having a front sheet and a back sheet, wherein a height of the front sheet is smaller than the height of the back sheet, an entrance of the packaging bag is arranged between an upper edge of the front sheet and an upper edge of the back sheet; a seal tab is arranged on the upper part of the back sheet and above the upper edge of the front sheet, and comprises a release film layer and a pull tab from top to bottom in that sequence; wherein width of the release film layer is greater than or equal to thickness of the first adhesive layer and the release film layer is bonded with the seal tab via the first adhesive layer; the pull tab comprises a plastic layer, the plastic layer is bonded with the seal tab via a second adhesive layer, width of the plastic layer is the same as the thickness of the second adhesive layer, an opening notch is arranged on the pull tab, and a tensile strength of the plastic layer is greater than a tensile strength of the bag body.
 2. The easy-to-open packaging bag according to claim 1, wherein material of the bag body, of the release film layer and of the plastic layer is plastic; width of the opening notch is greater than or equal to width of the pull tab, a cross section of the opening notch is either detached or in dashed line, and a guide slit is respectively arranged at either side of the opening notch in a slitting direction thereof.
 3. The easy-to-open packaging bag according to claim 1, wherein the width of the plastic layer is 1-10 mm and the thickness of the plastic layer is 0.01-0.2 mm.
 4. The easy-to-open packaging bag according to claim 2, wherein the width of the plastic layer is 1-10 mm and the thickness of the plastic layer is 0.01-0.2 mm.
 5. The easy-to-open packaging bag according to claim 1, wherein shape of the opening notch is circular, elliptic, rectangular, or fan-shaped. 